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      1 #!/usr/sbin/dtrace -Zs
      2 /*
      3  * js_flowtime.d - JavaScript function flow with delta times using DTrace.
      4  *                 Written for the JavaScript DTrace provider.
      5  *
      6  * $Id: js_flowtime.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $
      7  *
      8  * This traces activity from all browsers on the system that are running
      9  * with JavaScript provider support.
     10  *
     11  * USAGE: js_flowtime.d 	# hit Ctrl-C to end
     12  *
     13  * FIELDS:
     14  *		C		CPU-id
     15  *		TIME(us)	Time since boot, us
     16  *		FILE		Filename that this function belongs to
     17  *		DELTA(us)	Elapsed time from previous line to this line
     18  *		FUNC		Function name
     19  *
     20  * LEGEND:
     21  *		->		function entry
     22  *		<-		function return
     23  *
     24  * Filename and function names are printed if available.
     25  *
     26  * WARNING: Watch the first column carefully, it prints the CPU-id. If it
     27  * changes, then it is very likely that the output has been shuffled.
     28  *
     29  * COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
     30  *
     31  * CDDL HEADER START
     32  *
     33  *  The contents of this file are subject to the terms of the
     34  *  Common Development and Distribution License, Version 1.0 only
     35  *  (the "License").  You may not use this file except in compliance
     36  *  with the License.
     37  *
     38  *  You can obtain a copy of the license at Docs/cddl1.txt
     39  *  or http://www.opensolaris.org/os/licensing.
     40  *  See the License for the specific language governing permissions
     41  *  and limitations under the License.
     42  *
     43  * CDDL HEADER END
     44  *
     45  * 09-Sep-2007	Brendan Gregg	Created this.
     46  */
     47 
     48 #pragma D option quiet
     49 #pragma D option switchrate=10
     50 
     51 self int depth;
     52 
     53 dtrace:::BEGIN
     54 {
     55 	printf("%3s %-16s %-18s %9s -- %s\n", "C", "TIME(us)", "FILE",
     56 	    "DELTA(us)", "FUNC");
     57 }
     58 
     59 javascript*:::function-entry,
     60 javascript*:::function-return
     61 /self->last == 0/
     62 {
     63 	self->last = timestamp;
     64 }
     65 
     66 javascript*:::function-entry
     67 {
     68 	this->delta = (timestamp - self->last) / 1000;
     69 	printf("%3d %-16d %-18s %9d %*s-> %s\n", cpu, timestamp / 1000,
     70 	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
     71 	    copyinstr(arg2));
     72 	self->depth++;
     73 	self->last = timestamp;
     74 }
     75 
     76 javascript*:::function-return
     77 {
     78 	this->delta = (timestamp - self->last) / 1000;
     79 	self->depth -= self->depth > 0 ? 1 : 0;
     80 	printf("%3d %-16d %-18s %9d %*s<- %s\n", cpu, timestamp / 1000,
     81 	    basename(copyinstr(arg0)), this->delta, self->depth * 2, "",
     82 	    copyinstr(arg2));
     83 	self->last = timestamp;
     84 }
     85